System and Method for Location Identification
A system for location identification in a local area network comprising: a current limited voltage source; a telecommunications outlet; communication cabling connecting the current limited voltage source to the telecommunications outlet; and a location identifier associated with the telecommunications outlet, the location identifier being responsive to a pre-determined voltage level from the current limited voltage source to transmit a multi-bit location data. In one embodiment the multi-bit location data is received at the power sourcing equipment and in another embodiment the multi-bit location data is received at a data terminal equipment connected to the telecommunications outlet.
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This application claims priority from provisional U.S. Patent Application Ser. No. 60/775,776 filed Feb. 23, 2006 entitled “System and Method for Location Identification” the entire contents of which is incorporated herein by reference.
BACKGROUND OF THE INVENTIONThe present invention relates to the field of physical location identification suitable for use with emergency services, and more particularly to a system and method of providing an identifier associated with a fixed physical location of a wall jack.
The use of local area networks, and in particular Ethernet based networks, continues to expand. Additionally, telephony utilizing voice over Internet protocol (VoIP) is rapidly becoming common for new workplace installations at least in part due to its reduced cost of installation and flexibility. VoIP advantageously is powered by power over Ethernet (PoE), as embodied in the IEEE 802.3af-2003 standard, published by the Institute of Electrical and Electronics Engineers, Inc., New York, N.Y. the entire contents of which is incorporate herein by reference. The above standard defines a power sourcing equipment (PSE) which identifies, optionally classifies, and optionally powers a powered device (PD). A PD is defined by the above standard as a device that is either drawing power or requesting power by participating in the PD detection algorithm. The device may comprise a data terminal equipment (DTE), and a DTE receiving power over the communication cabling is often termed a PD.
By utilizing both PoE and VoIP, a single set of low power communication cables provides both computing and telephone connectivity to users throughout an office. VoIP further allows a user to utilize telephone service via wireless access points, which are advantageously powered via PoE. VoIP further allows users to plug in to any Ethernet connection and obtain phone service.
One downside of the expanding use of VoIP is the difficulty in handling emergency calls, and in particular identifying the location of callers to emergency services. The user may connect from any point in the network, and may further be connected via a wireless access point. Traditional telephony has been designed with features which support delivering crucial location information to emergency operators in Public Safety Answering Points (PSAPs). Unfortunately, VoIP, which allows for voice to be handled over data connections, is not designed to support delivering the crucial location information. For example, a roaming user in a wide area network may log in from a different city, and be connected as if he were locally located. In the event of an emergency call, the PSAP in the wrong city would then be notified, resulting in a delayed response or complete lack of response, from emergency services.
As the public adopts VoIP, emergency calls, also known in the United States as E-9-1-1 calls, will increasingly originate from VoIP users. The National Emergency Number Association VoIP-Packet Technical Committee has published a standard entitled “Interim VoIP Architecture for Enhanced 9-1-1 Services (i2)”, available from National Emergency Number Association (NENA), Arlington Va., the entire contents of which is incorporated herein by reference. The standard defines an architecture for the interconnection of VoIP domains with existing Emergency Services Network infrastructure in support of the migration toward end-to-end emergency calling over the VoIP networks between callers and PSAPs.
During system installation, cables are laid throughout the premises to be wired, with the cables being terminated at a work area in a telecommunications outlet/connector (TO) as defined by TIE/EIA 568 published by the Telecommunications Industry Association 2001 of Arlington, Va., and by ISO/IEC 11801 the entire contents of both of which are incorporated herein by reference. The TO is connected via horizontal cabling, optionally through at most one each of a transition or consolidation point, a user patch panel and an equipment patch panel to the common equipment which typically comprises a switch/hub or bridge. Optionally, a midspan device may be connected between the common equipment and one user patch panel to provide power. The connections between the common equipment and the TO may be changed by rearranging patch cords connected between any of the common equipment, the user patch panel and the equipment patch panel. In an installation in which both a user patch panel and an equipment patch panel are provided, or a midspan device and a user patch panel are provided, the connections between the common equipment and the TO are typically changed by rearranging patch cords between the equipment patch panel or the midspan device and the user patch panel. The prior art teaches that any such changes are to manually uploaded to a database which is designed to supply information to the PSAP within 24 hours. Unfortunately, this is a manual task separate and apart from the reconnection, and is thus liable to be neglected or in error. It is understood that the TO is typically not moved, as moving the TO entails construction work such as moving of walls as well as re-cabling from the transition or consolidation point, or the equipment room.
Large commercial entities typically have a large number of computers, telephones, printers and other network connected electronic equipment, generally referred to as assets. Tracking the location and connection of each of the assets in the network is known as asset management. Prior art systems require special equipment and patch cords in order to register the actual interconnection of network based assets. Such a requirement adds cost, and reduces flexibility. It would be desirable to further provide asset management, wherein the connection path from at least the PSE to the TO is made known. Further preferably the connection path from the common equipment to the TO and/or the DTE or VoIP endpoint is made known. The approach being developed for E-9-1-1 services is based on the premise that the VoIP endpoint, defined as an endpoint IP device that is used to originate an emergency call, is the entity most qualified to store and manage its own location information. Unfortunately, prior art methods rely on a human update of any changes in the connection between the common equipment port and the VoIP Endpoint. In the event that these changes, which commonly occur when moving or changing location of personnel, and are commonly known as “moves, adds and changes”, are not properly reflected in the location database or location information server (LIS) the location information sent by the VoIP endpoint will be in error. Such an error may result in a delay in the provisioning of life saving emergency services.
U.S. Patent Application Publication S/N US 2004/0073597 A1 published Apr. 15, 2004 to Caveney et al, the entire contents of which is incorporated herein by reference, is addressed to a system for managing and documenting a local area communications network which deploys power sourcing equipment and powered devices by the use of active electronic modules, having an Ethernet controller and Power over Ethernet forwarding capabilities. The requirement for an Ethernet controller adds to the expense of such a solution.
U.S. Pat. No. 6,650,622 issued Nov. 18, 2003 to Austermann, III et al., the entire contents of which is incorporated herein by reference, is addressed to a communication system for generating and monitoring data over pre-existing conductors in cables between associated pieces of networked computer equipment. The system is not integrated with power over Ethernet. Additionally, asset management functionality is accomplished with a plurality of sender tags and a decoder plug associated with a computer or other DTE, and an immovable object, which is costly and difficult to implement.
What is needed therefore, and is not provided by the prior art, is a system and method providing location information which may be associated with a DTE, and in particular a DTE making an emergency call. Preferably, a DTE comprising either data or voice equipment is automatically associated with location information when plugged in, thus facilitating the transfer of correct location information in the event of an emergency call. Further preferably the system and method should not require attaching additional equipment to a DTE.
SUMMARY OF THE INVENTIONAccordingly, it is a principal object of the present invention to overcome the disadvantages of prior art. This is provided in the present invention by a system and method for identifying the physical location of a DTE connected in a local area network by providing a location identifier associated with each TO. The location identifier is loaded with multi-bit location data. A current limited voltage source associated with a floor distributor, and preferably further associated with either a common equipment of the floor distributor or a midspan device, is further provided. The location identifier, responsive to a pre-determined voltage level, or a signal, from the current limited voltage source transmits the multi-bit location data. In an exemplary embodiment the current limited voltage source is a PSE.
The multi-bit location data may be a unique multi-bit identification code, and a database is further provided with an association of each of the multi-bit identification codes with a physical location of the TO. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information.
In one embodiment the location identifier transmits the multi-bit location data to the current limited voltage source and the current limited voltage source monitors the current flow thereby detected and receiving the transmission. The current limited voltage source further communicates the received multi-bit location data to a database along with information regarding which port of the voltage source received the multi-bit location data. The database is further provided with a listing of voltage source ports and their associated common equipment ports. The database further receives the MAC address and/or IP address of all DTEs or PDs attached, as well as the common equipment port to which they are attached. Utilizing the common equipment port information, the database associates one of the MAC address and the IP address with the multi-bit location data which is associated with a physical location. The physical location is thus updated automatically for use in identifying a caller's location when an emergency call is made.
In one further embodiment each equipment type between the voltage source and the DTE or PD is provided with a location identifier. The location identifier is provided with information indicating the type of equipment to which it is associated as well as a multi-bit location data. The current limited voltage source signals the location identifier associated with each type of equipment to transmit in turn its multi-bit location data and monitors the resultant current flow to detect and receive the resultant transmission. In response to the received multi-bit location data of each type of equipment connected to a port of the voltage source, the complete path between the voltage source and the TO is identified automatically and communicated to the database. Such an embodiment advantageously provides complete asset management between the voltage source and the TO.
In another embodiment the location identifier transmits the multi-bit location data to a DTE connected to the TO. The DTE responds to database queries with the multi-bit location data received from the TO to which it is connected. The database further receives the MAC address and/or IP address of all DTEs attached. The physical location is thus updated automatically for use in identifying a caller's location when an emergency call is made.
The invention provides for a system for location identification in a local area network comprising: a current limited voltage source; a telecommunications outlet; communication cabling connecting the current limited voltage source to the telecommunications outlet; and a location identifier associated with the telecommunications outlet, the location identifier being responsive to a pre-determined voltage level from the current limited voltage source to transmit a multi-bit location data.
In one embodiment, the pre-determined voltage level comprises a plurality of levels, the plurality of levels indicating an address. In another embodiment, the current limited voltage source is constituted of one of an endpoint power sourcing equipment and a midspan power sourcing equipment.
In one embodiment, the location identifier is operative to modulate the current flow from the current limited voltage source thereby transmitting the multi-bit location data. In one further embodiment the current limited voltage source is further operative to monitor the current flow, thereby receiving the transmitted multi-bit location data. In one yet further embodiment, the system further comprises a location database, the current limited voltage source being further operative to communicate the received multi-bit location data to the location database. In one yet further embodiment, the system further comprises one of a switch, hub, router and bridge, the one of a switch, hub, router and bridge being connected to the telecommunications outlet at least partially by the communication cabling, the database being further operative to associate the received multi-bit location data with a specific port of the one of a switch, hub, router and bridge. In one yet even further embodiment, the system further comprises a data terminal equipment connected to the telecommunications outlet, the database being further operative to transmit the received multi-bit location data to the data terminal equipment via the communication cabling.
In another further embodiment, the system further comprises a switch host, the current limited voltage source being further operative to communicate the received multi-bit location data to the switch host. In one yet further embodiment, the system further comprises a switch associated with the switch host, the switch host being further operative to associate the received multi-bit location data with equipment connected to a specific port of the switch. In one yet further embodiment, the system comprises a data terminal equipment connected to the telecommunication outlet, the switch host being further operative to communicate the multi-bit location data to the data terminal equipment.
In one embodiment, the system further comprises a data terminal equipment connected to the telecommunication outlet, the data terminal equipment receiving the transmitted multi-bit location data. In one further embodiment, the data terminal equipment comprises a receiver operative to receive the multi-bit location data, the receiver being powered by the received multi-bit location data. In another further embodiment, the data terminal equipment further comprises a memory, the data terminal equipment being operative to store the multi-bit location data on the memory. In yet another further embodiment, the data terminal equipment is further operative to communicate the received multi-bit identification to a location database.
In one embodiment, the pre-determined voltage signal is a classification voltage. In another embodiment, the pre-determined voltage signal is current limited, the current limited voltage signal presenting less power than an amount that damages a data terminal equipment which has not been designed to accept power over communication cabling connected via the communication cabling. Preferably, the pre-determined voltage signal is in excess of 10 volts.
In one embodiment the pre-determined voltage signal is current limited, is above 10 volts, and is time limited such that the average power of the pre-determined voltage signal over a pre-determined cycle time is less than 150 milliwatts. In another embodiment the multi-bit location data comprises one of a geographic location and a civic location.
The invention further provides for a method for location identification in a local area network comprising: providing a telecommunications outlet; providing a location identifier associated with the telecommunications outlet; providing a current limited voltage source connected via communication cabling to the telecommunications outlet; setting a voltage of the current limited voltage source to a predetermined level; and transmitting a multi-bit location data from the location identifier responsive to the predetermined level.
In one embodiment, the pre-determined level comprises a plurality of levels, the plurality of levels indicating an address. In another embodiment the provided current limited voltage source is constituted of one of an endpoint power sourcing equipment and a midspan power sourcing equipment.
In one embodiment, the transmitting comprises modulating the current flow from the provided current limited voltage source. In another embodiment the method further comprises monitoring the current flow, thereby receiving the transmitted multi-bit location data.
In one further embodiment, the method further comprises providing a location database, and communicating the received multi-bit location data to the provided location database. In one yet further embodiment, the method further comprises: providing one of a switch, hub and router; and associating the received multi-bit location data with a specific port of the provided one of a switch, hub and router. In one yet further embodiment the method further comprises transmitting the multi-bit identification to a data terminal equipment connected to the specific port.
In one further embodiment the method further comprises: providing a switch host; and communicating the received multi-bit location data to the provided switch host. In one yet further embodiment, the method further comprises: providing a switch; and associating the communicated multi-bit location data with equipment connected to a specific port of the provided switch. In one yet further embodiment, the method further comprises communicating the multi-bit location data to the equipment connected to the specific port.
In one embodiment, the method further comprises providing a data terminal equipment, and receiving the transmitted multi-bit location data at the provided data terminal equipment. In one further embodiment, the method further comprises powering the receiving by a signal comprising the received multi-bit location data. In another further embodiment, the method further comprises storing the received multi-bit location data. In yet another further embodiment, the method further comprises communicating the received multi-bit identification from the data terminal equipment to a location database.
In one embodiment, the pre-determined signaling voltage is a classification voltage. In another embodiment the pre-determined signaling voltage is current limited, the current limited voltage signal presenting less power than an amount that damages a data terminal equipment which has not been designed to accept power over communication cabling connected via the communication cabling. Preferably, the pre-determined voltage signal is in excess of 10 volts.
In one embodiment the pre-determined signaling voltage is current limited, is above 10 volts, and is time limited such that the average power of the pre-determined voltage signal over a pre-determined cycle time is less than 150 milliwatts. In another embodiment the multi-bit location data comprises one of a geographic location and a civic location.
Independently, the invention provides for a system for automatic location identification comprising: a current limited voltage source; a telecommunications outlet; a communication cabling connecting the current limited voltage source to the telecommunications outlet; a data terminal equipment connected to the telecommunications outlet; and a location identifier associated with the telecommunications outlet, the location identifier being responsive to a pre-determined voltage signal from the current limited voltage source to transmit a multi-bit location data to the data terminal equipment.
Independently, the invention provides for a system for automatic location identification comprising: a current limited voltage source; a telecommunications outlet; a communication cabling connecting the current limited voltage source to the telecommunications outlet; a data terminal equipment connected to the telecommunications outlet; and a location identifier associated with the telecommunications outlet, the location identifier being responsive to a predetermined voltage signal from the current limited voltage source to transmit a multi-bit location data to the data terminal equipment.
Independently, the invention provides for a system for asset management comprising: one of a switch, hub, router and bridge; a current limited voltage source associated with the one of a switch, hub and router; a location database; at least one of a telecommunications outlet, a consolidation point, a user patch panel and an equipment patch panel, each comprising a location identifier; and a plurality of communication cabling serially connecting the one of a switch, hub and router to each of the equipment patch panel, user patch panel, consolidation point and telecommunications outlet; the current limited voltage source being operative to signal in turn each of the location identifier of the equipment patch panel, user patch panel, consolidation point and telecommunications outlet, each of the location identifiers transmitting location information to the current limited voltage source responsive to the signal.
Additional features and advantages of the invention will become apparent from the following drawings and description.
For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, purely by way of example, to the accompanying drawings in which like numerals designate corresponding elements or sections throughout.
With specific reference now to the drawings in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of the preferred embodiments of the present invention only, and are presented in the cause of providing what is believed to be the most useful and readily understood description of a principles and conceptual aspects of the invention. In this regard, no attempt is made to show structural details of the invention in more detail than is necessary for a fundamental understanding of the invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice. In the accompanying drawings:
The present embodiments enable a system and method for identifying the physical location of a DTE connected in a local area network by providing a location identifier associated with each TO. The location identifier is loaded with multi-bit location data. A current limited voltage source associated with a floor distributor, and preferably further associated with either a common equipment of the floor distributor or a midspan device, is further provided. The location identifier, responsive to a pre-determined voltage level, or a signal, from the current limited voltage source transmits the multi-bit location data. In an exemplary embodiment the current limited voltage source is a PSE.
The multi-bit location data may be a unique multi-bit identification code, and a database is further provided with an association of each of the multi-bit identification codes with a physical location of the TO. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information.
In one embodiment the location identifier transmits the multi-bit location data to the current limited voltage source and the current limited voltage source monitors the current flow thereby detected and receiving the transmission. The current limited voltage source further communicates the received multi-bit location data to a database along with information regarding which port of the voltage source received the multi-bit location data. The database is further provided with a listing of voltage source ports and their associated common equipment ports. The database further receives the MAC address and/or IP address of all DTEs or PDs attached, as well as the common equipment port to which they are attached. Utilizing the common equipment port information, the database associates at least one of the MAC address and the IP address with the multi-bit location data which is associated with a physical location. The physical location is thus updated automatically for use in identifying a caller's location when an emergency call is made.
In one further embodiment each equipment type between the voltage source and the DTE or PD is provided with a location identifier. The location identifier is provided with information indicating the type of equipment to which it is associated as well as a multi-bit location data. The current limited voltage source signals the location identifier associated with each type of equipment to transmit in turn its multi-bit location data and monitors the resultant current flow to detect and receive the resultant transmission. In response to the received multi-bit location data of each type of equipment connected to a port of the voltage source, the complete path between the voltage source and the TO is identified automatically and communicated to the database. Such an embodiment advantageously provides complete asset management between the voltage source and the TO.
In another embodiment the location identifier transmits the multi-bit location data to a DTE or PD connected to the TO. The DTE or PD responds to database queries with the multi-bit location data received from the TO to which it is connected. The database further receives the MAC address and/or IP address of all DTEs attached. The physical location is thus updated automatically for use in identifying a caller's location when an emergency call is made.
Advantageously, in at least one embodiment identification according to the subject invention is independent of the high speed data according to IEEE 802.3. Additionally, in at least one embodiment otherwise passive devices between a concentrator such as a switch and an active device is provided with a location identifier responsive to a signal from a current limited voltage source. The location identifier is typically not operational during high speed data transmission and does interfere in any way. Preferably, the system is further operative to provide fully automated asset management.
Before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of the components set forth in the following description or illustrated in the drawings. The invention is applicable to other embodiments or of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and should not be regarded as limiting.
System 10 is shown as comprising each of equipment patch panel 50, user patch panel 60 and consolidation point 90, however this is not meant to be limiting in any way. Each of equipment patch panel 50, user patch panel 60 and consolidation point 90 are optional and are not required for the operation of system 10. Common equipment 30 comprises one of a switch, hub, bridge or router and patch cords. PSE 40 provides power over horizontal cabling 70 to power a compatible PD 110, preferably in accordance with IEEE 802.3af. In an exemplary embodiment PSE 40 is part of common equipment 30 and embedded therein. As described above a powered DTE is typically called a PD. Location database 120 is illustrated as being directly connected to common equipment 30 however this is not meant to be limiting in any way and may comprise a data connection via the local area network.
In operation, location database 120 is manually provided with a listing of locations associated with ports of common equipment 30. In the event of any change in wiring, such as a change in the arrangement of patch cords 55 constituting the cross connection between equipment patch panel 50 and user patch panel 60, the listing is updated manually to reflect the wiring change. Unfortunately the requirement to update the list manually, done as a separate step from the wiring change, may be forgotten or not fully completed and thus location database 120 may not fully reflect the wiring change.
System 150 is shown as comprising each of user patch panel 60 and consolidation point 90, however this is not meant to be limiting in any way. Each of user patch panel 60 and consolidation point 90 are optional and are not required for the operation of system 150. Common equipment 30 comprises one of a switch, hub, bridge or router. Midspan PSE 170 injects power over horizontal cabling 70 to power a compatible PD 110, preferably in accordance with IEEE 802.3 af. As described above a powered DTE is also called a PD, and midspan PSE 170 is preferably arranged to provide power to each port of common equipment 30 so that a PD may be connected to any port. Location database 120 is illustrated as being directly connected to common equipment 30, however this is not meant to be limiting in any way and may comprise a data connection via the local area network.
In operation location database 120 is manually provided with a listing of locations associated with ports of common equipment 30. In the event of any change in wiring, such as a change in the arrangement of patch cords 55 constituting the cross connection between midspan PSE 170 and user patch panel 60, the listing is updated manually to reflect the wiring change. Unfortunately the requirement to update the list manually, done as a separate step from the wiring change, may be forgotten or not fully completed and thus location database 120 may not fully reflect the wiring change.
System 200 is shown as comprising each of equipment patch panel 50, user patch panel 60 and consolidation point 90, however this is not meant to be limiting in any way. Each of equipment patch panel 50, user patch panel 60 and consolidation point 90 are optional and are not required for the operation of system 200. Common equipment 30 comprises one of a switch, hub, router or bridge. Endpoint PSE 220 provides power over horizontal cabling 70 to power a compatible PD 260 via ports of common equipment 30, preferably in accordance with IEEE 802.3af, and additionally is operative to receive the multi-bit location data associated with location identifier 250 in a manner that will be explained further hereinto below. In an exemplary embodiment endpoint PSE 220 is part of common equipment 30 and embedded therein Location database 270 is illustrated as being directly connected to common equipment 30 and endpoint PSE 220 however this is not meant to be limiting in any way. Location database 270 may be connected to common equipment 30 and/or endpoint PSE 220 by a data connection via the local area network without exceeding the scope of the invention.
In operation, each location identifier 250 is supplied with, loaded with, or set to contain, a multi-bit location data. The multi-bit location data may be a unique multi-bit identification code, and a database is further provided with an association of each of the multi-bit identification codes with a physical location of the TO. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with location identifier 250, in another embodiment the multi-bit location data is loaded as a unique identifying number drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment the multi-bit location data comprises complete physical location information. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by the PSE to location identifier 250 at installation as an AC signal modulating a voltage. Location database 270 is provided with a listing of TO locations and their associated multi-bit location data if required, as well as any interconnect information required to correlate ports of endpoint PSE 220 with ports of common equipment 30. Location database 270 may be provided with the listing manually or in connection with an automated or semi-automated installation routine. In the rare instance in which a TO 240 is replaced or physically moved, location database 270 is manually updated.
In one embodiment, endpoint PSE 220 identifies a valid attached PD 260, typically in accordance with IEEE 802.3af mentioned above, and then sets the voltage to the classification range to classify the identified valid PD 260. In an exemplary further embodiment in which endpoint PSE 220 is operative in accordance with IEEE 802.3af, the voltage during classification presented by endpoint PSE 220 is to be 14.5V to 20.5V at PD 260. Location identifier 250 senses the classification voltage and in response transmits the multi-bit location data to endpoint PSE 220 by modulating the port current. Preferably, the communication from location identifier 250 to endpoint PSE 220 is thus by common mode signaling, and is orthogonal to normal IEEE 802.3 data transmission. Endpoint PSE 220 is further operative to monitor the port current and extract the multi-bit location data transmitted in combination with the PD supplied classification current.
A DTE 110 attached to TO 240 will not exhibit a valid identification to endpoint PSE 220. Endpoint PSE 220, responsive to a failed identification phase, outputs a current limited DC power exhibiting a voltage less than a pre-determined amount Vpse
Preferably Vpse
Location identifier 250 senses the voltage set to the pre-determined Vpse
U.S. patent application Ser. No. 10/961,108 filed Oct. 12, 2004 to Darshan et al, entitled “Powered Device Interface Circuit”, the entire contents of which is incorporated herein by reference, describes communication between a PD 260 and an endpoint PSE 200 or midspan PSE 300 by modulating an operating voltage level. Preferably, communication from location identifier 250 according to the present invention is at a time which does not overlap with the communication from PD 260 to endpoint PSE 200.
The above has been described in relation to an embodiment in which detection of a valid PD is first attempted, however this is not meant to be limiting in any way. In another embodiment, as will be described further hereinto below in relation to
Location database 270 and optional asset management database 275 thus receive updates of adds, deletes and changes of all connections between common equipment 30 and DTE 110 without requiring manual intervention. Emergency services are thus supplied with full detail regarding the location of an emergency caller. Similarly, asset management is automatically updated without reference to data communication or human intervention.
System 280 is shown as comprising each of user patch panel 60 and consolidation point 90, however this is not meant to be limiting in any way. Each of equipment patch panel 50, user patch panel 60 and consolidation point 90 are optional and are not required for the operation of system 10. Common equipment 30 comprises one of a switch, hub, bridge or router. Midspan PSE 300 provides power over horizontal cabling 70 to power a compatible PD 260 for each port of common equipment 30, preferably in accordance with IEEE 802.3af, and additionally is operative to receive the multi-bit location data associated with location identifier 250 in a manner that will be explained further hereinto below. Location database 270 is illustrated as being directly connected to common equipment 30 and midspan PSE 300 however this is not meant to be limiting in any way. Location database 270 may be connected to common equipment 30 and/or midspan PSE 300 by a data connection via the local area network without exceeding the scope of the invention.
In operation, each location identifier 250 is supplied with, or loaded with, or set to contain, a multi-bit location data. The multi-bit location data may be a unique multi-bit identification code, and a database is further provided with an association of each of the multi-bit identification codes with a physical location of the TO. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with location identifier 250, in another embodiment the multi-bit location data is loaded as a unique identifying number drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by the PSE to location identifier 250 at installation as a response to an AC signal superimposed on a PSE voltage. Location database 270 is provided with a listing of TO locations and their associated multi-bit location data if required, as well as any interconnect information required to correlate ports of endpoint PSE 220 with ports of common equipment 30. Location database 270 may be provided with the listing manually or in connection with an automated or semi-automated installation routine. In the rare instance in which a TO 240 is replaced or physically moved, location database 270 is manually updated. Similarly in the rare instance in which the wiring between common equipment 30 and midspan PSE 300 is changed, location database 270 is manually updated.
In one embodiment, midspan PSE 300 identifies a valid attached PD 260 and then sets the voltage to the classification range to classify the identified valid PD 260. In an exemplary further embodiment in which midspan PSE 300 is operative in accordance with IEEE 802.3af, the voltage during classification presented by midspan PSE 300 is to be 14.5V to 20.5V at PD 260. Location identifier 250 senses the classification voltage and in response transmits the multi-bit location data to midspan PSE 300 by modulating the port current. Preferably, the communication from location identifier 250 to midspan PSE 300 is thus by common mode signaling, and is orthogonal to normal IEEE 802.3 data transmission. Midspan PSE 300 is further operative to monitor the port current and extract the multi-bit location data transmitted in combination with the PD supplied classification current.
A DTE 110 attached to TO 240 will not exhibit a valid identification to midspan PSE 300. Midspan PSE 300, responsive to a failed identification phase, outputs a current limited DC power exhibiting a voltage less than a pre-determined amount Vpse
Location identifier 250 senses the voltage set to the pre-determined Vpse
The above has been described in relation to an embodiment in which detection of a valid PD is first attempted, however this is not meant to be limiting in any way. In another embodiment, as will be described further hereinto below in relation to
Emergency services are thus supplied with full detail regarding the location of an emergency caller. Similarly, asset management is automatically updated without reference to data communication or human intervention.
In stage 1210 powering ports of endpoint PSE 220 or midspan PSE 300, respectively, associated with ports of common equipment 30 are stored in location database 270. Endpoint PSE 220 and midspan PSE 300 are collectively hereinafter referred to as a PSE. In an exemplary embodiment stage 1210 is accomplished manually or semi-manually at time of installation, with any updates being similarly accomplished manually or semi-manually as incurred. Thus, the combination of stages 1200 and 1210 provide a database of TO multi-bit location data codes, physical locations associated therewith, and an association between ports of a PSE and ports of common equipment 30.
In stage 1220, a PSE beings the detection process, preferably in accordance with IEEE 802.3af. In an exemplary embodiment a current limited voltage is connected to a PSE port, and if present, a signature resistance in a PD 260 connected to the PSE port is detected. In the absence of a PD 260 across the port, the signature resistance will not be detected.
In stage 1230 the results of the detection of stage 1220 are compared with a valid PD detection. In the event that a valid PD 260 has been detected, in stage 1240 voltage to the port exhibiting the valid detected PD is set to a classification range voltage. In an exemplary embodiment PD 260, responsive to the classification range voltage presented by the PSE, exhibits a current draw associated with maximum power usage by PD 260. In stage 1250 the PSE monitors the current drawn during the classification phase to detect the appropriate classification of PD 260.
In stage 1260, the PSE further monitors a change in current flow during the classification phase to detect a multi-bit location data transmitted by location identifier 250. In stage 1270, location identifier 250 transmits the multi-bit location data associated therewith to the PSE by modulating the current flow. In the event that the PD does not exhibit a classification current, a small amount of current is sunk and modulated by location identifier 250. The modulated current flow is monitored and detected at the PSE as described above in relation to stage 1260. Thus, the PSE receives both a classification current if present, and the multi-bit location data of location identifier 250. In one embodiment stage 1270 is delayed from stage 1240 so as to allow the PSE to monitor and unambiguously determine the power requirement of PD 260. Preferably, the communication from location identifier 250 to endpoint PSE 220 or midspan PSE 300 is thus by common mode signaling, and is orthogonal to normal IEEE 802.3 data transmission
In stage 1280, the multi-bit location data transmitted and received in stages 1270, 1280 and the associated port of the PSE receiving the multi-bit location data, are transmitted to location database 270. In stage 1290, the received multi-bit location data, which is associated in location database 270 with a physical location as described above in relation to stage 1200, and the associated powering port of the PSE which is associated in location database 270 with a port of common equipment 30 as described above in relation of stage 1210, are utilized to associate a port of common equipment 30 with a physical location. In an embodiment in which multi-bit location data comprises complete physical location information, location database 270 functions to cross identify ports of common equipment 30 to powering ports of the PSE. It is to be understood, that optional asset management database 275 is similarly updated. In one embodiment (not shown) location database 270 further acts to transmit the location information to the associated DTE 110 or PD 260, thus DTE 110 or PD 260 receives and stores location information associated therewith.
In the event that in stage 1230 a valid PD has not been detected, in stage 1300 the voltage output presented by the PSE to the port is set to a voltage Vpse
In stage 1310 the PSE monitors the current flow resulting from the application of Vpse
In stage 1330, the status of PD 260 identified and classified in stages 1230, 1250 is monitored to ensure that PD 260 is still drawing power and thus has not been disconnected. It is to be understood, that preferably the PSE monitors a maintain power signature and thus in the event that a PD 260 is powered and subsequently disconnected the PSE is notified of the disconnection. In the event that no PD 260 has been powered, i.e. stages 1300-1320 are executed, a timer is set and a time out is awaited. Preferably the timer allows for at least the minimum safe time allowed for Vpse
Thus, in the event of an emergency call, system 200 or system 280 is operative to retrieve the physical location associated with the common equipment port originating the emergency call from location database 270 as described above for transmittal to an emergency dispatcher. It is to be understood that in the event of a change in connection between equipment patch panel 50 and user patch panel 60 or a change in connection between midspan power sourcing equipment 300 and user patch panel 60 the system automatically identifies by the operation of the method of
In stage 1510 powering ports of endpoint PSE 220 or midspan PSE 300, respectively, associated with ports of common equipment 30 are stored in location database 270. In an exemplary embodiment stage 1510 is accomplished manually or semi-manually at time of installation, with any updates being similarly accomplished manually or semi-manually as incurred. Thus, the combination of stages 1500 and 1510 provide a database of TO multi-bit location data codes, physical locations associated therewith, and an association between ports of a PSE and ports of common equipment 30.
In stage 1520 the voltage output presented by the PSE to the port is set to a voltage Vpse
In stage 1530 the PSE monitors the current flow resulting from the application of Vpse
In stage 1570 a timer is set, the timer being set with a minimum cycle time whose value is pre-determined. As described above the voltage, current levels and on time of Vpse
Thus, in the event of an emergency call, system 200 or system 280 is operative to retrieve the physical location associated with the common equipment port originating the emergency call from location database 270 as described above for transmittal to an emergency dispatcher. It is to be understood that in the event of a change in connection between equipment patch panel 50 and user patch panel 60 or a change in connection between midspan power sourcing equipment 300 and user patch panel 60 the system automatically identifies the change by the operation of the method of
The embodiments of
First center tapped inductor 420 is connected across a first pair of conductors labeled a1, a2, the first pair of conductors representing a first twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. The center tap of first center tapped conductor 420 is connected to a first input of diode bridge 440 and is further connected by way of first and second impedance 430 respectively to conductor a1, a2. Second center tapped inductor 420 is connected across a second pair of conductors labeled b1, b2, the second pair of conductors representing a second twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. The center tap of second center tapped conductor 420 is connected to a second input of diode bridge 440 and is further connected by way of third and fourth impedance 430 respectively to conductor b1, b2.
The positive output of diode bridge 440, representing the positive output of interface 400, is connected to the input of electronically controlled switch 460 and to the input of control 450. Control 450 is connected to the gate input of electronically controlled switch 460, to the data control of multi-bit location data storage 470 and the control input of current modulator 480. The data output of multi-bit location data storage 470 is connected to the input of current modulator 480. The switched output of electronically controlled switch 460 is connected to current modulator 480. The return output of diode bridge 440, representing the return of interface 400 is connected to control 450 and the return output of current modulator 480.
First, second, third and fourth impedance 430 are optional, and are selected as required to match the impedance of the combination of interface 400 and transmitting module 410 to the cable impedance of inductor pairs a1, a2 and b1, b2 so as to reduce attenuation, return loss and transmission loss caused by first and second inductor 420. Preferably, interface 400 enables location identifier 250 to meet connecting hardware level requirements for performance according to Category 5e, Category 6 and Category 7A as defined by TIE/EIA 568 referenced above. Diode bridge 440 is provided to allow polarity insensitive operation, however diode bridge 440 may be optionally removed without exceeding the scope of the invention.
In operation, interface 400 provides power for transmitting module 410 and further provides impedance matching for the twisted wire pairs of the communication cabling. Preferably, transmitting module 410 operates on a minimal amount of current, further preferably on the order of 2 mA. In an exemplary embodiment silicon technology exhibiting low impedance at the high speed data frequency is utilized in the production of interface 400. Interface 400 may be a packaged chip or interface 400 and transmitting module 410 may be packaged in a conventional dual in line package, or in a multi-chip module. Control 450 is operative to monitor the input voltage, and in accordance with the method described above in relation to
In one further embodiment, control 450 is operative to detect a sequence of voltages modulated on Vpse
The multi-bit location data stored within multi-bit location data storage 470 may be a unique multi-bit identification code drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with transmitting module 410. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by the PSE to transmitting module 410 at installation as an AC signal modulating a voltage such as an AC signal modulating Vpse
First impedance 510 is connected between a first conductor, labeled conductor a1, of a first pair of conductors, and a first input of first diode bridge 440. A first input of impedance 520 is further connected to first conductor a1. Second impedance 510 is connected between a second conductor, labeled conductor a2, of the first pair of conductors, and a first input of second diode bridge 440. A second input of impedance 520 is further connected to second conductor a2. Conductors a1, a2 represent a first twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. Third impedance 510 is connected between a first conductor, labeled conductor b1, of a second pair of conductors, and a second input of first diode bridge 440. A third input of impedance 520 is further connected to second conductor b1. Fourth impedance 510 is connected between a second conductor, labeled conductor b2, of the second pair of conductors, and a second input of second diode bridge 440. Conductors b1, b2 represent a second twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. A second input of impedance 520 is further connected to second conductor b2. Impedance 520 is further connected to a chassis ground.
The positive output of first diode bridge 440 is connected via first resistance 530 to the positive output of interface 500, and the positive output of second diode bridge 400 is similarly connected via second resistance 530 to the positive output of interface 500. The return of first diode bridge 440 is connected to the return of second diode bridge 440 and represents the return output of interface 500.
The positive output of interface 500 is connected to the input of electronically controlled switch 460 and to the input of control 450. Control 450 is connected the gate input of electronically controlled switch 460, to the data control of multi-bit location data storage 470 and the control input of current modulator 480. The data output of multi-bit location data storage 470 is connected to the input of current modulator 480. The switched output of electronically controlled switch 460 is connected to current modulator 480. The return of interface 500 is connected to control 450 and to the return output of current modulator 480.
First, second, third and fourth impedance 510 are optional, and are selected as required to match the impedance of the combination of interface 500 and transmitting module 410 to the cable impedance of inductor pairs a1, a2 and b1, b2 so as to reduce attenuation, return loss and transmission loss. Preferably, interface 500 enables location identifier 250 to meet connecting hardware level requirements for performance according to Category 5e, Category 6 and Category 7A as defined by TIE/EIA 568 referenced above Impedance 520 is optionally, and is only required to complete the impedance matching. Preferably, interface 500 is constituted of silicon technology exhibiting a high impedance at the operative high speed data frequency.
In operation, interface 500 provides power for transmitting module 410 and further provides impedance matching for the twisted wire pairs of the communication cabling. Preferably, transmitting module 410 operates on a minimal amount of current, further preferably on the order of 2 mA. Control 450 is operative to monitor the input voltage, and in accordance with the method described in relation to
In one further embodiment, control 450 is operative to detect a sequence of voltages modulated on Vpse
The multi-bit location data stored within multi-bit location data storage 470 may be a unique multi-bit identification code drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with transmitting module 410. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by the PSE to transmitting module 410 at installation as an AC signal modulating a voltage such as an AC signal modulating Vpse
First impedance 560 is connected between a first conductor, labeled conductor a1, of a first pair of conductors, and a first input of diode bridge 440. A first input of impedance 570 is further connected to first conductor a1. A second input of impedance 570 is further connected to second conductor, labeled conductor a2, of the first pair of conductors. The first pair of conductors labeled a1, a2, represent a first twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. Second impedance 560 is connected between a first conductor, labeled conductor b1, of a second pair of conductors, and a second input of diode bridge 440. A third input of impedance 570 is further connected to first conductor b1. A fourth input of impedance 570 is further connected to a second conductor, labeled b2, of the second pair of conductors. The second pair of conductors labeled b1, b2, represent a second twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. Impedance 570 is further connected to a chassis ground. The positive output of diode bridge 440 represents the positive output of interface 550 and the return of diode bridge 440 represents the return output of interface 500.
The positive output of interface 500 is connected to the input of electronically controlled switch 460 and to the input of control 450. Control 450 is connected the gate input of electronically controlled switch 460, to the data control of multi-bit location data storage 470 and the control input of current modulator 480. The data output of multi-bit location data storage 470 is connected to the input of current modulator 480. The switched output of electronically controlled switch 460 is connected to current modulator 480. The return of interface 500 is connected to control 450 and to the return output of current modulator 480.
First and second impedances 560 are optional, and are selected as required to match the impedance of the combination of interface 550 and transmitting module 410 to the cable impedance of inductor pairs a1, a2 and b1, b2 so as to reduce attenuation, return loss and transmission loss caused by first and second inductor 420. Preferably, interface 400 enables location identifier 250 to meet connecting hardware level requirements for performance according to Category 5e, Category 6 and Category 7A as defined by TIE/EIA 568 referenced above. Impedance 570 is optional and is only required to complete the impedance matching. Preferably, interface 550 is constituted of constituted of silicon technology exhibiting a high impedance at the operative high speed data frequency.
In operation, interface 550 provides power for transmitting module 410 and further provides an impedance matching for the twisted wire pairs of the communication cabling. Preferably, transmitting module 410 operates on a minimal amount of current, further preferably on the order of 2 mA. Control 450 is operative to monitor the input voltage, and in accordance with the method described in relation to
In one further embodiment, control 450 is operative to detect a sequence of Vpse
The multi-bit location data stored within multi-bit location data storage 470 may be a unique multi-bit identification code drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with transmitting module 410. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by the PSE to transmitting module 410 at installation as an AC signal modulating a voltage such as an AC signal modulating Vpse
It is to be understood that location identifier is designed to not be moved separately from TO 240. This can be accomplished by producing an integrated TO 240 having embedded therein location identifier 250. However, in certain circumstances it may be desirable to provide a location identifier which may be installed with a TO 240 of the prior art.
PSE 610 is connected by at least two twisted pair connections to location identifier 615. PSE side interface 630, which may similar to one of interface 400, 500 and 550 of
In one embodiment receiver 660 comprises a common mode receiver, in which a signal is transmitted as a difference between two twisted wire pairs. In another embodiment receiver 660 comprises a differential mode receiver.
In operation, transmitting module 640 senses a voltage presented by PSE 610, the voltage preferably being above the detection voltage. In one embodiment the detected voltage is Vpse
Transmitting module 640, responsive to the detected voltage followed by the removal of the detected voltage is operative to transmit a multi-bit location data stored therein towards receiver 660 of DTE or PD 620. After completion of the transmission, transmitting module 640 returns to a high impedance state. Receiver 660, which may be operative in the absence of power being supplied by PSE 610, receives the multi-bit location data. In one embodiment receiver 660 accepts operating power from the transmitted signal from transmitting module 640, and in another embodiment receiver 660 is provided with a power source such as a rechargeable battery. In the event DTE or PD 620 comprises a PD, after powering up of the PD, receiver 660 transmits the received multi-bit location data to operative PD or DTE circuitry 670. In the event that DTE or PD 620 comprises a DTE, after the DTE has completed an initiation phase, the DTE request location data from receiver 660, and in response receiver 660 transmits the received multi-bit location data to operative PD or DTE circuitry 670.
Optionally and additionally, transmitting module 640 is operational in a manner described above in relation to
In stage 1610, PSE 610 presents an identification voltage to DTE or PD 620. In the event that DTE or PD 620 comprises a PD, in stage 1620 the identification resistance presented by PD 620 is recognized as being within a valid range, and in stage 1630 PSE 620 optionally classifies PD 620 and then powers PD 620. In stage 1640, identifier transmitting module 640 senses the operating power and transmits the location data loaded in stage 1600 to PD 620 via differential mode signaling in which data is transmitted by a connection to one of the data pairs. In one embodiment PD 620 is operative to prevent powering of operative DTE or PD circuitry 670 for a pre-determined time to allow for receipt of location data without interference. Preferably, identifier transmitting module first charges up an internal capacitor and then disconnects the input connection so that the output differential signaling does not interfere with the input. In another embodiment in which the communication described in pending U.S. patent application Ser. No. 10/961,108 to Darshan et al incorporated above is present, transmitting module 640 transmits before or after the transmission time of the PD. In yet another embodiment transmission is accomplished by signaling at a lower frequency than the high speed transmission of data according to the IEEE 802.3 Ethernet standard, however using differential signaling as described in the above standard. Receiver 660 is operative to filter out the signals at the lower frequency. In yet another embodiment, transmission is at a frequency as described in the above IEEE 802.3 Ethernet standard, however interference is minimized since data transmission does not occur immediately upon powering.
In stage 1650 receiver 660, powered by operating power from PSE 610 senses the location data transmission, receives the location data and stores the received location data in memory 680.
In stage 1660, in the event of an emergency call being placed by a user utilizing operative PD or DTE circuitry 670, which in an exemplary embodiment comprises a VoIP telephone or computer having VoIP capability, operative PD or DTE circuitry 670 transmits the request for emergency services along with the location data received and stored in stage 1650.
In stage 1670 the status of PD 620 identified and classified in stages 1610, 1630 is monitored to ensure that PD 620 is still drawing power and thus has not been disconnected. It is to be understood, that preferably the PSE monitors a maintain power signature and thus in the event that a PD 620 is powered and subsequently disconnected the PSE is notified of the disconnection. In the event that PD 620 has not disconnected stage 1670 is repeated. In the event PD 620 has been detected as being disconnected stage 1610 as described above is repeated.
In the event that in stage 1620 DTE or PD 620 does not comprise a PD, and thus in stage 1620 the identification resistance presented by DTE or PD 620 is not recognized as being within a valid range, in stage 1680 PSE 610 sets its output voltage to Vpse
In stage 1690, identifier transmitting module 640 senses voltage Vpse
In stage 1720, after operative PD or DTE circuitry 670 has completed an initialization phase, operative PD or DTE circuitry 670 reads the location data stored in stage 1710.
Thus, in the event of an emergency call being placed by a user utilizing operative PD or DTE circuitry 670, which in an exemplary embodiment comprises a VoIP telephone or computer having VoIP capability, in stage 1730 operative PD or DTE circuitry 670 transmits the request for emergency services along with the location data read in stage 1720.
In stage 1740, PSE 610 sets an internal timer. In one embodiment the internal timer is set for a 1 minute interval. In stage 1750 the timer set is stage 1740 is checked for expiration. In the event the timer has not expired, stage 1750 is repeated. In the event the time has expired stage 1610 as described above is again performed.
In stage 1800 the identifier transmitting module 640 of each TO 610 is loaded with location data. Preferably, the location data is formatted as a Presence Information Document Format Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with transmitting module 640. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by the PSE to transmitting module 640 at installation as an AC signal modulating a voltage such as an AC signal modulating Vpse
In stage 1810, PSE 610 presents an identification voltage to DTE or PD 620. In the event that DTE or PD 620 comprises a PD, in stage 1820 the identification resistance presented by PD 620 is recognized as being within a valid range, and in stage 1830 PSE 620 outputs a classification level voltage to PD 620. In stage 1840, identifier transmitting module 640 senses the classification voltage level and charges an internal capacitor (not shown). In stage 1850, after a predetermined time period calculated to be sufficient to charge the internal capacitor of identifier transmitting module 640, PSE 610 disconnects power thus presenting a high impedance to identifier transmitting module 640. In stage 1860 identifier transmitting module 640 transmits the location data loaded in stage 1600 to PD 620 via one of common mode signaling and differential mode signaling to PD 620 via voltage pulses using the energy stored in the internal capacitor charged in stage 1840. In one embodiment PD 620 is operative to prevent powering of operative DTE or PD circuitry 670 for a predetermined time to allow for receipt of location data without interference. Preferably, identifier transmitting module first charges up the internal capacitor and then disconnects the input connection so that the output differential signaling does not interfere with the input. In another embodiment in which the communication described in pending U.S. patent application Ser. No. 10/961,108 to Darshan et al incorporated above is present, transmitting module 640 transmits before or after the transmission time of the PD. In yet another embodiment transmission is accomplished by signaling at a lower frequency than the high speed transmission of data according to the IEEE 802.3 Ethernet standard, however using differential signaling as described in the above standard. Receiver 660 is operative to filter out the signals at the lower frequency. In yet another embodiment, transmission is at a frequency as described in the above IEEE 802.3 Ethernet standard, however interference is minimized since data transmission does not occur immediately upon powering.
In stage 1870 receiver 660, optionally powered from the voltage pulses transmitted in stage 1860, senses the location data transmission, receives the location data and stores the received location data in memory 680.
In stage 1880, in the event of an emergency call being placed by a user utilizing operative PD or DTE circuitry 670, which in an exemplary embodiment comprises a VoIP telephone or computer having VoIP capability, operative PD or DTE circuitry 670 transmits the request for emergency services along with the location data received and stored in stage 1870.
In stage 1890 the status of PD 620 identified in stage 1810, 1820 is monitored to ensure that PD 620 is still drawing power and thus has not been disconnected. It is to be understood, that preferably the PSE monitors a maintain power signature and thus in the event that a PD 620 is powered and subsequently disconnected the PSE is notified of the disconnection. In the event that PD 620 has not disconnected stage 1890 is repeated. In the event PD 620 has been detected as being disconnected stage 1810 as described above is repeated.
In the event that in stage 1820 DTE or PD 620 does not comprise a PD, and thus in stage 1820 the identification resistance presented by DTE or PD 620 is not recognized as being within a valid range, in stage 1900 PSE 610 sets its output voltage to Vpse
In stage 1920, identifier transmitting module 640 senses voltage Vpse
In stage 1940, after operative PD or DTE circuitry 670 has completed an initialization phase, operative PD or DTE circuitry 670 reads the location data stored in stage 1930.
Thus, in the event of an emergency call being placed by a user utilizing operative PD or DTE circuitry 670, which in an exemplary embodiment comprises a VoIP telephone or computer having VoIP capability, in stage 1950 operative PD or DTE circuitry 670 transmits the request for emergency services along with the location data read in stage 1940.
In stage 1960, PSE 610 sets an internal timer. In one embodiment the internal timer is set for a 1 minute interval. In stage 1970 the timer set is stage 1960 is checked for expiration. In the event the timer has not expired, stage 1970 is repeated. In the event the time has expired, stage 1810 as described above is again performed.
First center tapped inductor 420 is connected across a first pair of conductors labeled a1, a2, the first pair of conductors representing a first twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. The center tap of first center tapped conductor 420 is connected to a first input of diode bridge 440 and is further connected by way of first and second impedance 430 respectively, to conductor a1, a2. Second center tapped inductor 420 is connected across a second pair of conductors labeled b1, b2, the second pair of conductors representing a second twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. The center tap of second center tapped conductor 420 is connected to a second input of diode bridge 440 and is further connected by way of third and fourth impedance 430 respectively, to conductor b1, b2.
The positive output of diode bridge 440, representing the positive output of combined interface 700, is connected to the input of electronically controlled switch 460 and to the input of control 710. A first output of control 710 is connected the gate input of electronically controlled switch 460, a second output of control 710 is connected to multi-bit location data storage 470, a third output of control 710 is connected to an enable input of signal driver 720 and a fourth output of control 710 is connected to the gate input of electronically controlled switches 465, 467. The output of electronically controlled switch 460 is connected to one end of storage capacitor 730 to a second isolated power input of control 710 and to the input of voltage regulator 735. The second end of storage capacitor 730 is connected to the input of electronically controlled switch 465, to the return of control 710 and to the return output of bridge 440 representing the return of combined interface 700. The output of multi-bit location data storage 470 is connected to the input of signal driver 720 and the output of signal driver 720 is connected via electronically controlled switch 467 to the center tap of first center tapped inductor 420. Voltage regulator 730 is connected in parallel to capacitor 730 and maintains a regular voltage fed to signal driver 720 and multi-bit location data storage 470. The output of electronically controlled switch 465 is connected to the center tap of second center tapped inductor 420. Power for control 710 is shown as being received from either side of first electronically controlled switch 460, and care must be taken to ensure isolation to avoid leakage around first electronically controlled switch 460. Alternatively, control 710 may comprise two sections connected by an opto-isolator.
In operation, combined interface 700 provides power for transmitting module 640 and further provides an impedance matching for the twisted wire pairs of the communication cabling so as to reduce attenuation, return loss and transmission loss. Preferably, interface 700 enables location identifier 615 to meet connecting hardware level requirements for performance according to Category 5e, Category 6 and Category 7A as defined by TIE/EIA 568 referenced above. Impedance 520 is optionally, and is only required to complete the impedance matching. In an exemplary embodiment low cost silicon based technology exhibiting a low impedance at the operative frequency of the high data transmission may be utilized in the production of combined interface 700. Combined interface 700 may be a packaged chip or a multi-chip module. Control 710 is operative to monitor the input voltage, and upon detection of an appropriate voltage level as will be described further hereinto below, is further operative to close electronically controlled switch 460 thereby charging up storage capacitor 730. Upon detection that the input voltage has dropped to approximately zero, or another pre-determined voltage, control 710 is operative to open electronically controlled switch 460 and close electronically controlled switches 465, 467. Control 710 is further operative to transmit the multi-bit identification stored in multi-bit location data storage 470 via signal driver 720 towards receiver 660 of
After completion of the transmission, control 710 is operative to open electronically controlled switch 465, 467 thereby returning the combination of combined interface 700 and transmitting module 640 to a high impedance state.
The multi-bit location data stored within multi-bit location data storage 470 may be a unique multi-bit identification code drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with transmitting module 640. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by the PSE to transmitting module 640 at installation as an AC signal modulating a voltage such as an AC signal modulating Vpse
In stage 2010, the PSE being either endpoint PSE 220 or midspan PSE 290 sets the voltage to Vpse
In stage 2020, control 710 of location identifier 615 senses voltage Vpse
In stage 2040, control 710 senses the absence of Vpse
In stage 2050 the multi-bit location data code stored in multi-bit location data storage 470 is transmitted to receiver 660. In stage 2060, receiver 660 stores the received multi-bit location data code in a memory location. In an exemplary embodiment the storage is accomplished using the energy transmitted by signal driver 720. Thus, in the exemplary embodiment, the data transmission is accomplished by DC pulses which transmit both information and energy.
In one embodiment receiver 660 comprises a common mode receiver, in which a signal is transmitted as a difference between two twisted wire pairs by signal driver 720. In another embodiment receiver 660 comprises a differential mode receiver, in which a signal is transmitted as a normal Ethernet network signal by signal driver 720 being so arranged.
In stage 2070, having transmitted the multi-bit location data code stored in multi-bit location data storage 470, control 710 opens second electronically controlled switch 465 thus returning location identifier 615 to a high impedance state. In stage 2080, after operative PD or DTE circuitry 670 has completed an initialization phase, operative PD or DTE circuitry 670 reads the multi-bit identifier stored in stage 2060. In stage 2090, the system queries PD or DTE operative circuitry 670 for a MAC and/or IP address, and in response the system is provided with the MAC and/or IP address and the multi-bit location data code transmitted in stage 2050 and stored in stage 2060. In stage 2100 the location as loaded in stage 2000 is associated via the multi-bit location data code with the MAC and/or IP address.
Thus, in the event of an emergency call, system 200, 280 is operative to retrieve the physical location associated with the common equipment port originating the emergency call from database 270 for transmittal to an emergency dispatcher.
It is to be understood that the method of
In stage 2210, PSE 610 sets the voltage to Vpse
In stage 2220, control 710 of location identifier 615 senses voltage Vpse
In stage 2240, control 710 senses the absence of Vpse
In stage 2250 the location data stored in multi-bit location data storage 470 is transmitted to receiver 660. In stage 2260, receiver 660 stores the received data in a memory location. In an exemplary embodiment the storage is accomplished using the energy transmitted by signal driver 720. Thus, in the exemplary embodiment, the data transmission is accomplished by DC pulses which transmit both information and energy.
In one embodiment receiver 660 comprises a common mode receiver, in which a signal is transmitted as a difference between two twisted wire pairs by signal driver 720. In another embodiment receiver 660 comprises a differential mode receiver, in which a signal is transmitted as a normal Ethernet network signal by signal driver 720 being so arranged.
In stage 2270, having transmitted the location information stored in multi-bit location data storage 470, control 710 opens electronically controlled switches 465, 467 thus returning location identifier 615 to a high impedance state. In stage 2280, after operative PD or DTE circuitry 670 has completed an initialization phase, operative PD or DTE circuitry 670 reads the location information stored in stage 2260.
Thus, in the event of an emergency call being placed by a user utilizing operative PD or DTE circuitry 670, which in an exemplary embodiment comprises a VoIP telephone or computer having VoIP capability, in stage 2290 operative PD or DTE circuitry 670 transmits the request for emergency services along with the location information read in stage 2280.
It is to be understood that the method of
Combined interface 700 of
In stage 2410, PSE 610 sets the voltage to Vpse
In stage 2420, control 710 of location identifier 615 senses voltage Vpse
In stage 2440, control 710 senses the absence of Vpse
In stage 2450 the location data stored in multi-bit location data storage 470 is transmitted by differential mode signaling towards the common equipment. In one embodiment a default address is assigned to the signaling, the default address being associated with a location database. In another embodiment, at initial installation an IP address for the destination is downloaded to data storage 470 as part of stage 2400. In stage 2460, common equipment or the location database stores the received location data associated with the common equipment port which received it.
In stage 2470, having transmitted the location information stored in multi-bit location data storage 470, control 710 opens electronically controlled switches 465, 467 thus returning location identifier 615 to a high impedance state.
Thus, in the event of an emergency call being placed by a user utilizing operative PD or DTE circuitry 670, which in an exemplary embodiment comprises a VoIP telephone or computer having VoIP capability, the location database has location information associated with a common equipment port.
It is to be understood that the method of
Combined interface 700 of
First center tapped inductor 420 is connected across a first pair of conductors labeled a1, a2, the first pair of conductors representing a first twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. The center tap of first center tapped conductor 420 is connected to a first input of diode bridge 440 and is further connected by way of first and second impedance 430 respectively, to conductor a1, a2. Second center tapped inductor 420 is connected across a second pair of conductors labeled b1, b2, the second pair of conductors representing a second twisted pair connection in accordance with the above mentioned IEEE 802.3af standard. The center tap of second center tapped conductor 420 is connected to a second input of diode bridge 440 and is further connected by way of third and fourth impedance 430 respectively, to conductor b1, b2.
Only conductors of a first set comprising two twisted wire pairs are shown for simplicity however this is not meant to be limiting in any way. In particular a second set of diode bridge 440, first through fourth impedances 430 and first and second inductors 420 may be supplied across a second set of two twisted wire pairs without exceeding the scope of the invention. Thus, power and/or voltage signaling may be received via either first or second set of two twisted wire pairs, representing data and spare pairs, without exceeding the scope of the invention. Differential transmission is preferably on only on a single twisted wire pair, which may not coincide with the pairs providing power without exceeding the scope of the invention.
The positive output of diode bridge 440, representing the positive output of combined interface 700, is connected to the input of electronically controlled switch 460 and to the input of control 710. A first output of control 710 is connected the gate input of electronically controlled switch 460, a second output of control 710 is connected to multi-bit location data storage 470, a third output of control 710 is connected to an enable input of signal driver 720 and a fourth output of control 710 is connected to the gate input of electronically controlled switches 465, 467. The output of electronically controlled switch 460 is connected to one end of storage capacitor 730 to a second isolated power input of control 710 and to the input of voltage regulator 735. The second end of storage capacitor 730 is connected to the input of electronically controlled switch 465, to the return of control 710 and to the return output of bridge 440 representing the return of combined interface 700. The output of multi-bit location data storage 470 is connected to the input of signal driver 720 and the output of signal driver 720 is connected via electronically controlled switch 467 to conductor a2. Voltage regulator 730 is connected in parallel to capacitor 730 and maintains a regular voltage fed to signal driver 720 and multi-bit location data storage 470. The output of electronically controlled switch 465 is connected conductor a1. Power for control 710 is shown as being received from either side of first electronically controlled switch 460, and care must be taken to ensure isolation to avoid leakage around first electronically controlled switch 460. Alternatively, control 710 may comprise two sections connected by an opto-isolator.
In operation, combined interface 700 provides power for transmitting module 640 and further provides an impedance matching for the twisted wire pairs of the communication cabling so as to reduce attenuation, return loss and transmission loss. Preferably, interface 700 enables location identifier 615 to meet connecting hardware level requirements for performance according to Category 5e, Category 6 and Category 7A as defined by TIE/EIA 568 referenced above. Impedance 520 is optionally, and is only required to complete the impedance matching. In an exemplary embodiment low cost silicon based technology exhibiting a low impedance at the operative frequency of the high data transmission may be utilized in the production of combined interface 700. Combined interface 700 may be a packaged chip or a multi-chip module. Control 710 is operative to monitor the input voltage, and upon detection of an appropriate voltage level as will be described further hereinto below, is further operative to close electronically controlled switch 460 thereby charging up storage capacitor 730. Upon detection that the input voltage has dropped to approximately zero, or another pre-determined voltage, control 710 is operative to open electronically controlled switch 460 and close electronically controlled switches 465, 467. Control 710 is further operative to transmit the multi-bit identification stored in multi-bit location data storage 470 via signal driver 720 towards either receiver 660 of
After completion of the transmission, control 710 is operative to open electronically controlled switch 465, 467 thereby returning the combination of combined interface 700 and transmitting module 640 to a high impedance state.
The multi-bit location data stored within multi-bit location data storage 470 may be a unique multi-bit identification code drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with transmitting module 640. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by the PSE to transmitting module 640 at installation as an AC signal modulating a voltage such as an AC signal modulating Vpse
Endpoint PSE 830 is connected to common equipment 30 and common equipment 30 is connected by a plurality of connections to equipment patch panel 840. Equipment patch panel 840 is cross-connected to user patch panel 860, and user patch panel 860 is connected by horizontal cabling 70 comprising multiple communication cabling to consolidation point 880. Consolidation point 880 is connected to each of the plurality of TOs 890. Each DTE 110 and PD 260 is connected to a specific TO 890. As described above the configuration of system 800 is in accordance with a maximum populated channel as defined by the above mentioned EIA/TIA 568 standard.
System 800 is shown as comprising each of equipment patch panel 840, user patch panel 860 and consolidation point 880, however this is not meant to be limiting in any way. Each of equipment patch panel 840, user patch panel 860 and consolidation point 880 are optional and are not required for the operation of system 800. Common equipment 30 comprises one of a switch, hub, bridge or router. Endpoint PSE 830 provides power over horizontal cabling 70 to power a compatible PD 260 via ports of common equipment 30, preferably in accordance with IEEE 802.3af, and additionally is operative to poll each of location identifier 850, 852, 854 and 856 and receive a multi-bit location data associated with each of location identifier 850, 852, 854 and 856 in a manner that will be explained further hereinto below. Location database 870 is illustrated as being directly connected to common equipment 30 and endpoint PSE 830 however this is not meant to be limiting in any way. Location database 870 may be connected to common equipment 30 and/or endpoint PSE 830 by a data connection via the local area network, a wide area network, a wireless connection or over the Internet without exceeding the scope of the invention. Asset management database 875 is in communication with endpoint PSE 830, and the communication may be one of a direct wired connection, a data connection via the local area network, a wireless connection, or an Internet connection without exceeding the scope of the invention. Optionally, location database 870 may be in direct communication with asset management database 875.
In operation, endpoint PSE 830 signals each of location identifier 850, 852, 854 and 856 in turn to transmit a multi-bit location data stored therein. Preferably, endpoint PSE 830 sets the voltage on each port to be less than Vpse
Each location identifier 850, 852, 854 and 856 is supplied with, loaded with, or set to contain, a multi-bit location data. The multi-bit location data may be a unique multi-bit identification code, and location database 870 and/or asset management database 875 is further provided with an association of each of the multi-bit identification codes with a physical location of each of the location identifiers. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with each of location identifier 850, 852, 584, 856. In another embodiment the multi-bit location data for each location identifier is loaded as a unique identifying number drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment the multi-bit location data comprises complete physical location information. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by endpoint PSE 830 to each location identifier 850, 852, 854, 856 at installation as an AC signal modulating a voltage. Location database 870 is provided with a listing of location identifier physical locations and their associated multi-bit location data if required as well as any interconnect information required to correlate ports of endpoint PSE 830 with ports of common equipment 30. Location database 870 may be provided with the listing manually or in connection with an automated or semi-automated installation routine. In the rare instance in which an element is replaced or physically moved, location database 870 is manually updated.
As will be explained further hereinto below, endpoint PSE 830 receives the multi-bit location data associated with location identifier 850, 852, 854, 856 from each port, and provides the multi-bit location data to location database 870. Thus, location database 870 is provided with both ports of common equipment 30 and location information associated with each TO 890 connected to each port. In the event of an emergency message, the location of the emergency caller is identified via location database 870 utilizing the common equipment port associated with the emergency call, the interconnect information between common equipment ports and endpoint PSE 830 powering port, and the location information obtained from location identifier 856 of the associated TO 890.
Asset management database 875 is provided with a listing of multi-bit location data codes for each of identifier 850, 852, 854 and 856. Preferably, the multi-bit identification codes for each of identifier 850, 852 and 854 further comprises a port number identifier. Thus, endpoint PSE 830 receives a complete listing of port connections between a port of common equipment 30 and TO 890 including the identification of port connections for equipment patch panel 840, user patch panel 860 and consolidation point 880. Endpoint PSE 830 provides multi-bit identification codes associated with each of identifier 850, 852, 854 and 856 to asset management database 875, and thus asset management database 875 is provided with a complete map of all connections in the system. Such a complete map is useful for maintenance, overall asset management, tracking moves adds and changes and enhancing network security by detecting any unauthorized changes which allow unauthorized physical connection.
In an exemplary embodiment, endpoint PSE 830 sets the voltage at each port in turn to Vpse
Midspan PSE 920 is connected to common equipment 30 and is cross-connected to user patch panel 860 by a plurality of patch cords. User patch panel 860 is connected by horizontal cabling 70 comprising multiple communication cabling to consolidation point 880. Consolidation point 880 is connected to each of the plurality of TOs 890. Each DTE 110 and PD 260 is connected to a specific TO 890. As described above the configuration of system 900 is in accordance with a maximum populated channel as defined by the above mentioned EIA/TIA 568 standard.
System 900 is shown as comprising each of user patch panel 860 and consolidation point 880, however this is not meant to be limiting in any way. Each of user patch panel 860 and consolidation point 880 are optional and are not required for the operation of system 800. Common equipment 30 comprises one of a switch, hub, bridge or router. Midspan PSE 920 provides power over horizontal cabling 70 to power a compatible PD 260 preferably in accordance with IEEE 802.3af, and additionally is operative to poll each of location identifier 852, 854 and 856 and receive a multi-bit location data associated with each of location identifier 852, 854 and 856 in a manner that will be explained further hereinto below. Location database 870 is illustrated as being directly connected to common equipment 30 and midspan PSE 920 however this is not meant to be limiting in any way. Location database 870 may be connected to common equipment 30 and/or midspan PSE 920 by a data connection via the local area network, a wide area network, a wireless connection or over the Internet without exceeding the scope of the invention. Asset management database 875 is in communication with midspan PSE 920, and the communication may be one of a direct wired connection, a data connection via the local area network, a wireless connection, or an Internet connection without exceeding the scope of the invention. Optionally, location database 870 may be in direct communication with asset management database 875.
In operation, midspan PSE 920 signals each of location identifier 852, 854 and 856 in turn to transmit a multi-bit location data stored therein. Preferably, midspan PSE 920 sets the voltage on each port to be less than Vpse
Each location identifier 852, 854, and 856 is supplied with, loaded with, or set to contain, a multi-bit location data. The multi-bit location data may be a unique multi-bit identification code, and location database 870 and/or asset management database 875 is further provided with an association of each of the multi-bit identification codes with a physical location of each of the location identifiers. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with each of location identifier 852, 584, 856. In another embodiment the multi-bit location data for each location identifier is loaded as a unique identifying number drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment the multi-bit location data comprises complete physical location information. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by midspan PSE 920 to each location identifier 852, 854, 856 at installation as an AC signal modulating a voltage. Location database 870 is provided with a listing of location identifier physical locations and their associated multi-bit location data if required as well as any interconnect information required to correlate ports of midspan PSE 920 with ports of common equipment 30. Location database 870 may be provided with the listing manually or in connection with an automated or semi-automated installation routine. In the rare instance in which an element is replaced or physically moved, location database 870 is manually updated.
As will be explained further hereinto below, midspan PSE 920 receives the multi-bit location data associated with location identifier 852, 854, 856 from each port, and provides the multi-bit location data to location database 870. Thus, location database 870 is provided with both ports of common equipment 30 and location information associated with each TO 890 connected to each port. In the event of an emergency message, the location of the emergency caller is identified via location database 870 utilizing the common equipment port associated with the emergency call and the location information obtained from location identifier 856 of the associated TO 890 via the associated midspan PSE 920 powering port.
Asset management database 875 is provided with a listing of multi-bit location data codes for each of identifier 852, 854 and 856. Preferably, the multi-bit identification for each of identifier 852, 854 and 856 further comprises a port number identifier. Thus, midspan PSE 920 receives a complete listing of port connections between each output port of midspan PSE 920 and TO 890 including the identification of port connections for user patch panel 860 and consolidation point 880. Midspan PSE 920 provides multi-bit identification information associated with each of identifier 852, 854 and 856 to asset management database 875, and thus asset management database 875 is provided with a complete map of all connections in the system. Such a complete map is useful for maintenance, overall asset management, tracking moves adds and changes and enhancing network security by detecting any unauthorized changes which allow unauthorized physical connection.
In an exemplary embodiment, midspan PSE 920 sets the voltage at each port in turn to Vpse
In stage 3010, the PSE being either endpoint PSE 830 or midspan PSE 920 sets the voltage to Vpse
In stage 3020 the voltage output of the PSE is modulated to signal one type of equipment within the system as indicated by the pointer. In stage 3030, a wait state is inserted to await a response to the signal of stage 3020. In the event the equipment signaled in stage 3020 is present in the system, in stage 3040 the location identifier associated with the equipment type responds to the signal of stage 3020 by transmitting the multi-bit location data stored therein. The transmission is preferably accomplished by modulating the current flow as a result of Vpse
In the event that in stage 3030 the equipment is not present in the system, the wait state will time out without receiving a multi-bit location data, and in stage 3050 the index pointer is again checked to see if all types of equipment have been polled. It is to be understood that the PSE is not aware of the type of equipment present, and thus each type of equipment must be polled in turn.
In the event that in stage 3050 all equipment types have been polled, in stage 3070 the PSE transmits multi-bit location data received from location identifiers associated with TO equipment to location database 870. As indicated above the multi-bit location data may comprise physical location information. In stage 3080, the PSE transmits all multi-bit location data received from all location identifiers within each of the channels to asset management database 875. The above has been described in an embodiment in which data is transmitted to location database 870 and asset management database 875 only after all equipment types have been polled, however this is not meant to be limiting in any way. Transmission of data to location database 870 and asset management database 875 may be performed after each equipment type has transmitted without exceeding the scope of the invention.
Midspan PSE 920 is connected to common equipment 30 and is cross-connected to user patch panel 860 by a plurality of patch cords. User patch panel 860 is connected by horizontal cabling 70 comprising multiple communication cabling to consolidation point 880. Consolidation point 880 is connected to each of the plurality of TOs 890. Each DTE 110 and PD 260 is connected to a specific TO 890. As described above the configuration of system 900 is in accordance with a maximum populated channel as defined by the above mentioned EIA/TIA 568 standard.
System 930 is shown as comprising each of user patch panel 860 and consolidation point 880, however this is not meant to be limiting in any way. Each of user patch panel 860 and consolidation point 880 are optional and are not required for the operation of system 800. Common equipment 30 comprises one of a switch, hub, bridge or router. Midspan PSE 940 provides power over horizontal cabling 70 to power a compatible PD 260 preferably in accordance with IEEE 802.3af, and additionally is operative to poll each of location identifier 852, 854 and 856 and receive a multi-bit location data associated with each of location identifier 852, 854 and 856 in a manner that will be explained further hereinto below. Location database 870 is illustrated as being directly connected to common equipment 30 and midspan PSE 940 however this is not meant to be limiting in any way. Location database 870 may be connected to common equipment 30 and/or midspan PSE 940 by a data connection via the local area network, a wide area network, a wireless connection or over the Internet without exceeding the scope of the invention. Asset management database 875 is in communication with midspan PSE 940, and the communication may be one of a direct wired connection, a data connection via the local area network, a wireless connection, or an Internet connection without exceeding the scope of the invention. Optionally, location database 870 may be in direct communication with asset management database 875.
In operation, midspan PSE 940 signals each of location identifier 852, 854 and 856 in turn to transmit a multi-bit location data stored therein. Preferably, midspan PSE 940 sets the voltage on each port to be less than Vpse
Each location identifier 852, 854, 856 and 858 is supplied with, loaded with, or set to contain, a multi-bit location data. The multi-bit location data may be a unique multi-bit identification code, and location database 870 and/or asset management database 875 is further provided with an association of each of the multi-bit identification codes with a physical location of each of the location identifiers. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data, being constituted of an identification code, is set via switches associated with each of location identifier 852, 584, 856 and 858. In another embodiment the multi-bit location data for each location identifier is loaded as a unique identifying number drawn from a global numbering pool at manufacturing and preferably further affixed externally with a bar code. Such a bar code enables error free reading of the multi-bit identification and the correct association of the location with the correct multi-bit identification. In another embodiment the multi-bit location data comprises complete physical location information. In another embodiment, in which either an identification code or geographical data may be utilized, the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. In yet another embodiment the multi-bit location data is transmitted by midspan PSE 940 to each location identifier 852, 854, 856 at installation as an AC signal modulating a voltage, and location information is transmitted by current limited and monitored voltage source 935 to location identifier 858. Location database 870 is provided with a listing of location identifier physical locations and their associated multi-bit location data if required. Interconnect information is not required, since the addition of location identifier 858 serves to fully identify all connects in the channel. Location database 870 may be provided with the listing manually or in connection with an automated or semi-automated installation routine. If any is replaced or physically moved, location database 870 and asset management database 875 are automatically updated.
Midspan PSE 940 receives the multi-bit location data associated with location identifier 852, 854, 856 from each port, and provides the multi-bit location data to location database 870. Thus, location database 870 is provided with both ports of common equipment 30 and location information associated with each TO 890 connected to each port. In the event of an emergency message, the location of the emergency caller is identified via location database 870 utilizing the common equipment port associated with the emergency call and the location information obtained from location identifier 856 of the associated TO 890 via the associated midspan PSE 920 powering port.
Asset management database 875 is provided with a listing of multi-bit location data codes for each of identifier 852, 854 and 856. Preferably, the multi-bit identification for each of identifier 852, 854 and 856 further comprises a port number identifier. Thus, midspan PSE 920 receives a complete listing of port connections between each output port of midspan PSE 920 and TO 890 including the identification of port connections for user patch panel 860 and consolidation point 880. Midspan PSE 920 and current limited and monitored voltage source 935 provides multi-bit identification information associated with each of identifier 852, 854 and 856 to asset management database 875, and thus asset management database 875 is provided with a complete map of all connections in the system. Such a complete map is useful for maintenance, overall asset management, tracking moves adds and changes and enhancing network security by detecting any unauthorized changes which allow unauthorized physical connection.
In an exemplary embodiment, midspan PSE 940 sets the voltage at each port in turn to Vpse
Switch, hub, router or bridge 955 is connected to each TO 240, and each TO 240 is connected to a particular VoIP telephone 970. DHCP server 962 is in communication with switch, hub, router or bridge 955 preferably through an IP network. PSE 960 is arranged to power VoIP telephones 970 via respective TO 240, and is here illustrated as an endpoint PSE, however this is not meant to be limiting in any way, and a midspan embodiment is specifically included. PSE 960 is further arranged to supply an appropriate voltage to each TO 240 as has been described above to initiate transmission of a multi-bit location data stored thereon. Location database 950 is in communication with both PSE 960 and switch, hub, router or bridge 955. Switch, hub, router or bridge 955 and location database 965 are in communication with telephone server/gateway 975, and telephone server/gateway 975 is in communication with PSAP 985 via PSTN or IP Network 980. PSAP 985 is in communication with PS-ALI server 990. PS-ALI server 990 and location database 965 are further in communication with IP Network 980, and may communicate with each other over IP Network 980.
In operation, DHCP server 952 senses an attached VoIP telephone 970 and assigns an IP address. DHCP server 952 further queries location database 965 to access location information associated with the port of switch, hub, router or bridge 955 to which VoIP telephone 970 is attached, and downloads to memory 972 of VoIP telephone 970 the location information. In the event that a user, or user agent, initiates an emergency call from a VoIP telephone 970, the location information is transferred with the call initiation request. Telephone server/gateway 975 routes the call to an appropriate PSAP in response to the location information, and further functions to forward the call with the location information. In one embodiment, the call is forwarded with an emergency services query key (ESQK) in the automatic number identification (ANI) field, and the PSAP responsive the ESQK identifies the location for dispatch of emergency services. In one embodiment, the location is identified at least partially with reference to PS-ALI server 990. PS-ALI server 990 may further query location database 965 to receive complete location information based on the ESQK. The above is being described as a single embodiment in which the ESQK is used as a pointer, and PS-ALI server 990 requests further information based thereon due to the limited and constrained information transfer capability of PSTN 980. In another embodiment full information is transferred directly over IP Network 980 in parallel with, or as part of, the emergency call.
In stage 4010, a VoIP endpoint is attached, which in an exemplary embodiment is VoIP telephone 970 or computer having VoIP capabilities. In stage 4020, DHCP server 952 assigns the VoIP endpoint attached in stage 4010 an IP address, in a manner known to those skilled in the art. In stage 4030, DHCP server 952 retrieves the location data associated with the TO 240 to which the VoIP endpoint is attached from location database 965. In an exemplary embodiment, the location data is retrieved at least partially by utilizing the port number of switch, hub, router or bridge 955 to which the VoIP endpoint is attached.
In stage 4040, DHCP server 953 downloads the location data retrieved in stage 4030 to the VoIP endpoint attached in stage 4010, and in stage 4050 the downloaded location information is stored in memory 972. In stage 4060, the VoIP endpoint dials, or requests communication with, emergency services. In an exemplary embodiment, emergency services requests are accessed via requesting a voice call to 9-1-1. The request for emergency services is preferably forwarded with the location data downloaded and stored in stage 4040.
In stage 4070 a call server, such as telephone server/gateway 975, recognizes the emergency number dialed, and identifies the appropriate PSAP based on the location information forwarded with the request. In stage 4080, the emergency call is forwarded to the PSAP identified in stage 4070. In one embodiment, the call or request for emergency services, is forwarded with an ESQK in the ANI field. In stage 4090, PSAP 985 receives the request and looks up the location at least partially responsive to the ANI field as is known to those skilled in the art. In one embodiment the physical location data such as street address is found in PS-ALI server 990, and in another embodiment a separate Voice over IP Positioning Center (VPC) is provided which contains a translation between the ESQK and the location data originally stored on location database 965. PSAP 985 is thus operative to identify a physical location of the caller for emergency services personnel. It yet another embodiment PS-ALI server 990 queries location database 965 for full location data.
The above has been described in an embodiment in which a VoIP telephone or other VoIP endpoint receives location information from the DHCP server, however this is not meant to be limiting in any way. Location information may be retrieved by telephone server/gateway 975 from location database 965, or by another server (not shown) without exceeding the scope of the invention. In yet another embodiment, a global positional system (GPS) receiver is further provided in the VoIP endpoint, and provides location information at least partially in response to a location information output of the GPS receiver.
In another embodiment in which the configuration and method of
Switch host 1020 is in communication with switch 1010 and PSE 960, switch 1010 is connected to each TO 240, and each TO 240 is connected to a particular VoIP telephone 970. PSE 960 is arranged to power VoIP telephones 970 via respective TO 240, and is here illustrated as an endpoint PSE, however this is not meant to be limiting in any way, and a midspan embodiment is specifically included. PSE 960 is further arranged to supply an appropriate voltage to each TO 240 as has been described above, and in particular but without limitation in relation to
In operation, PSE 960 regularly sets the output voltage to each TO 240 in turn to Vpse
In the event that a user, or user agent, initiates an emergency call from a VoIP telephone 970, the location information is transferred with the call initiation request. Telephone server/gateway 975 routes the call to an appropriate PSAP in response to the location information, and further functions to forward the call with the location information. In one embodiment, the call is forwarded with an emergency services query key (ESQK) in the automatic number identification (ANI) field, and the PSAP responsive the ESQK identifies the location for dispatch of emergency services. In another embodiment the location information is forwarded via an IP link to the PSAP, and thus the PSAP is notified of the location of the requester of emergency services.
In stage 5000, each TO 240 within system 1000 is loaded with, or set to contain, multi-bit location data. The multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. Any updates caused by moving a TO 240 are similarly accomplished as incurred.
In stage 5010 switch host 1020 receives location information from each TO 240 within system 1000. In an exemplary embodiment each TO 240 transmits its location information responsive to Vpse
In stage 5020, switch host 1020 ascertains if a VoIP endpoint, such as VoIP telephone 970 has been attached to a respective TO 240 and is thus connected to system 1000. It is to be understood that in the event VoIP telephone 970 is to be powered over the communication cabling, PSE 960 will further operate to identify, optionally classify and power VoIP telephone 970. In the event that VoIP telephone 970 has not been attached, stage 5010 is repeated. It is to be noted that if powering is not required PSE 960 may be a current limited and monitored voltage source.
In the event that in stage 5020 a VoIP telephone 970 has been detected as attached, in stage 5030 switch host 1020 downloads location information received in stage 5010 to the VoIP telephone 970 detected in stage 5020 and the information is stored in memory 972. In stage 5040, a user utilizing VoIP telephone 970 dials, or requests communication with, emergency services. In an exemplary embodiment, emergency services requests are accessed via requesting a voice call to 9-1-1. The request for emergency services is preferably forwarded with the location information downloaded in stage 5030 and stored in memory 972.
In stage 5050 a call server, such as telephone server/gateway 975, recognizes the emergency number dialed, and identifies the appropriate PSAP based on the location information forwarded with the request and a database of PSAPs according to location. In stage 5060, the emergency call is forwarded to the PSAP identified in stage 5050. In one embodiment, the call or request for emergency services, is forwarded with an ESQK in the ANI field, the ESQK being generated to relay the location information over legacy E-9-1-1 equipment. In another embodiment the location information is directly transferred along with the call request. In stage 5070, PSAP 985 receives the request and looks up the location at least partially responsive to the ANI field and provides the location information to emergency service personnel. In one embodiment a VPC (not shown) is provided which contains a translation between the ESQK and the location information found in switch host 1020. In an embodiment in which the location information is forwarded to PSAP 985, the forwarded location information is provided to emergency services personnel. PSAP 985 is thus operative to identify a physical location of the caller for emergency services personnel.
In stage 5500, each TO 240 within system 1000 is loaded with location information. The multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. Any updates caused by moving a TO 240 are similarly accomplished as incurred.
In stage 5510, each TO 240 responsive to a received Vpse
In stage 5520, a user utilizing VoIP telephone 970 dials, or requests communication with, emergency services. In an exemplary embodiment, emergency services requests are accessed via requesting a voice call to 9-1-1. The request for emergency services is preferably forwarded with the location information received in stage 5510 and stored in memory 972.
In stage 5530 a call server, such as telephone server/gateway 975, recognizes the emergency number dialed, and identifies the appropriate PSAP based on the location information forwarded with the request and a database of PSAPs according to location. In stage 5540, the emergency call is forwarded to the PSAP identified in stage 5530. In one embodiment, the call or request for emergency services, is forwarded with an ESQK in the ANI field, the ESQK being generated to relay the location information over legacy E-9-1-1 equipment. In another embodiment the location information is directly transferred along with the call request. In stage 5550, PSAP 985 receives the request and looks up the location at least partially responsive to the ANI field and provides the location information to emergency service personnel. In one embodiment a VPC (not shown) is provided which contains a translation between the ESQK and the location information found in switch host 1020 or location database 965 of
PSE 960 may power wireless access points 1060 via respective TO 240, and is here illustrated as an endpoint PSE, however this is not meant to be limiting in any way. PSE 960 is further arranged to supply an appropriate voltage to each TO 240 as has been described above to initiate transmission of a multi-bit location data stored thereon. PSE 960 is arranged as a node to switch 960 and communicates with each wireless access point 1060.
In operation DCHP server assigns an IP address to switch 1010 and DSLAM/cable head end 1080 provides Internet access to Internet 1090 to switch 1010. Telephone server/gateway 975 provides telephone service to switch 1010 and all nodes connected thereto. Location identifier 1030 of each TO 240 within system 1050 is loaded with, or set to contain, multi-bit location data. The multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information. In one embodiment the multi-bit location data is loaded at an installation phase by one of a wired and a wireless connection preferably by a dedicated program on a portable computer or through dedicated functionality of a cabling tester. Any updates caused by moving a TO 240 are similarly accomplished as incurred.
As described above, responsive to a voltage signal from PSE 960, each location identifier 1030 transmits stored location data to PSE 960. Each device connected thereto, such as portable computer 1070 and cellular telephone 1075 accesses PSE 960 and uploads respective location data. In the event that a user, or user agent, initiates an emergency call the location information is transferred with the call initiation request. Telephone server/gateway 975 routes the call to an appropriate PSAP in response to the location information and a PSAP location databaase, and further functions to forward the call with the location information.
Thus, the present embodiments enable a system and method for identifying the physical location of a DTE connected in a local area network by providing a location identifier associated with each TO. The location identifier is loaded with multi-bit location data. A current limited voltage source associated with a floor distributor, and preferably further associated with either a common equipment of the floor distributor or a midspan device, is further provided. The location identifier, responsive to a pre-determined voltage level, or a signal, from the current limited voltage source transmits the multi-bit location data. In an exemplary embodiment the current limited voltage source is a PSE.
The multi-bit location data may be a unique multi-bit identification code, and a database is further provided with an association of each of the multi-bit identification codes with a physical location of the TO. In another embodiment the multi-bit location data comprises complete physical location information. Preferably, the location data is formatted as a Presence Information Document Format-Location Object (PIDF-LO). In one embodiment the location data comprises a geographic location including without limitation at least some of latitude, longitude, elevation and the datum which identifies the cording system used. In one further embodiment the location data is formatted using the World Geodetic System datum. In another embodiment the location data comprises a civic location constituted of a set of elements that describe detailed street address information. In one ever further embodiment location data comprises security or access information, including but not limited to company name, floor, cubicle or room location and hazardous material information.
In one embodiment the location identifier transmits the multi-bit location data to the current limited voltage source and the current limited voltage source monitors the current flow thereby detected and receiving the transmission. The current limited voltage source further communicates the received multi-bit location data to a database along with information regarding which port of the voltage source received the multi-bit location data. The database is further provided with a listing of voltage source ports and their associated common equipment ports. The database further receives the MAC address and/or IP address of all DTEs attached, as well as the common equipment port to which they are attached. Utilizing the common equipment port information, the database associates one of the MAC address and the IP address with the multi-bit location data which is associated with a physical location. The physical location is thus updated automatically for use in identifying a caller's location when an emergency call is made.
In one further embodiment each equipment type between the voltage source and the DTE is provided with a location identifier. The location identifier is provided with information indicating the type of equipment to which it is associated as well as a multi-bit location data. The current limited voltage source signals the location identifier associated with each type of equipment to transmit in turn its multi-bit location data and monitors the resultant current flow to detect and receive the resultant transmission. In response to the received multi-bit location data of each type of equipment connected to a port of the voltage source, the complete path between the voltage source and the TO is identified automatically and communicated to the database. Such an embodiment advantageously provides complete asset management between the voltage source and the TO.
In another embodiment the location identifier transmits the multi-bit location data to a DTE connected to the TO. The DTE responds to database queries with the multi-bit location data received from the TO to which it is connected. The database further receives the MAC address and/or IP address of all DTEs attached. The physical location is thus updated automatically for use in identifying a caller's location when an emergency call is made.
It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable subcombination.
Unless otherwise defined, all technical and scientific terms used herein have the same meanings as are commonly understood by one of ordinary skill in the art to which this invention belongs. Although methods similar or equivalent to those described herein can be used in the practice or testing of the present invention, suitable methods are described herein.
All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety. No admission is made that any reference constitutes prior art. The discussion of the reference states what their author's assert, and the applicants reserve the right to challenge the accuracy and pertinency of the cited documents. It will be clearly understood that, although a number of prior art complications are referred to herein, this reference does not constitute an admission that any of these documents forms part of the common general knowledge in the art in any country.
In the claims of this application and in the description of the invention, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is used in any inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
In case of conflict, the patent specification, including definitions, will prevail. In addition, the materials, methods, and examples are illustrative only and not intended to be limiting.
It will be appreciated by persons skilled in the art that the present invention is not limited to what has been particularly shown and described hereinabove. Rather the scope of the present invention is defined by the appended claims and includes both combinations and subcombinations of the various features described hereinabove as well as variations and modifications thereof which would occur to persons skilled in the art upon reading the foregoing description and which are not in the prior art.
Claims
1. A system for location identification in a local area network comprising:
- a current limited voltage source;
- a telecommunications outlet;
- a communication cabling connecting said current limited voltage source to said telecommunications outlet; and
- a location identifier associated with said telecommunications outlet, said location identifier being responsive to a pre-determined voltage level from said current limited voltage source to transmit a multi-bit location data.
2. A system according to claim 1, wherein said pre-determined voltage level comprises a plurality of levels, said plurality of levels indicating an address.
3. A system according to claim 1, wherein said current limited voltage source is constituted of one of an endpoint power sourcing equipment and a midspan power sourcing equipment.
4. A system according to claim 1, wherein said location identifier is operative to modulate the current flow from said current limited voltage source thereby transmitting said multi-bit location data.
5. A system according to claim 4, wherein said current limited voltage source is operative to monitor said current flow, thereby receiving said transmitted multi-bit location data.
6. A system according to claim 5, further comprising a location database, said current limited voltage source being further operative to communicate said received multi-bit location data to said location database.
7. A system according to claim 6, further comprising one of a switch, hub, router and bridge,
- said one of a switch, hub, router and bridge being connected to said telecommunications outlet at least partially by said communication cabling,
- said database being further operative to associate said received multi-bit location data with a specific port of said one of a switch, hub, router and bridge.
8. A system according to claim 7, further comprising a data terminal equipment connected to said telecommunications outlet, said database being further operative to transmit said received multi-bit location data to said data terminal equipment via said communication cabling.
9. A system according to any of claim 5 further comprising a switch host, said current limited voltage source being further operative to communicate said received multi-bit location data to said switch host.
10. A system according to claim 9, further comprising a switch associated with said switch host, said switch host being further operative to associate said received multi-bit location data with equipment connected to a specific port of said switch.
11. A system according to claim 10, further comprising a data terminal equipment connected to said telecommunication outlet, said switch host being further operative to communicate said multi-bit location data to said data terminal equipment.
12. A system according to claim 1, further comprising a data terminal equipment connected to said telecommunication outlet, said data terminal equipment receiving said transmitted multi-bit location data.
13. A system according to claim 12, wherein said data terminal equipment comprises a receiver operative to receive said multi-bit location data, said receiver being powered by said received multi-bit location data.
14. A system according to claim 12, said data terminal equipment further comprising a memory, said data terminal equipment being operative to store said multi-bit location data on said memory.
15. A system according to claim 12, wherein said data terminal equipment is further operative to communicate said received multi-bit identification to a location database.
16. A system according to claim 1, wherein said pre-determined voltage signal is a classification voltage.
17. A system according to claim 1, wherein said predetermined voltage signal is current limited, said current limited voltage signal presenting less power than an amount that damages a data terminal equipment which has not been designed to accept power over communication cabling connected via said communication cabling.
18. A system according to claim 1, wherein said pre-determined voltage signal is greater than 10 volts.
19. A system according to claim 1, wherein said predetermined voltage signal is current limited, is above 10 volts, and is time limited such that the average power of said pre-determined voltage signal over a pre-determined cycle time is less than 150 milliwatts.
20. A system according to claim 1, wherein said multi-bit location data comprises one of a geographic location and a civic location.
21. A method for location identification in a local area network comprising:
- providing a telecommunications outlet;
- providing a location identifier associated with said telecommunications outlet;
- providing a current limited voltage source connected via communication cabling to said telecommunications outlet;
- setting a voltage of said current limited voltage source to a predetermined level; and
- transmitting a multi-bit location data from said location identifier responsive to said predetermined level.
22. A method according to claim 21, wherein said predetermined level comprises a plurality of levels, said plurality of levels indicating an address.
23. A method according to claim 21, wherein said provided current limited voltage source is constituted of one of an endpoint power sourcing equipment and a midspan power sourcing equipment.
24. A method according to claim 21, wherein said transmitting comprises modulating the current flow from said provided current limited voltage source.
25. A method according to claim 21, further comprising monitoring said current flow, thereby receiving said transmitted multi-bit location data.
26. A method according to claim 25, further comprising providing a location database, and communicating said received multi-bit location data to said provided location database.
27. A method according to claim 25, further comprising:
- providing one of a switch, hub and router; and
- associating said received multi-bit location data with a specific port of said provided one of a switch, hub and router.
28. A method according to claim 25, further comprising transmitting said received multi-bit identification to a data terminal equipment connected to said specific port.
29. A method according to claim 25, further comprising:
- providing a switch host; and
- communicating said received multi-bit location data to said provided switch host.
30. A method according to claim 29, further comprising:
- providing a switch; and
- associating said communicated multi-bit location data with equipment connected to a specific port of said provided switch.
31. A method according to claim 30, further comprising communicating said multi-bit location data to the equipment connected to said specific port.
32. A method according to claim 21, further comprising providing a data terminal equipment, and receiving said transmitted multi-bit location data at said provided data terminal equipment.
33. A method according to claim 32, further comprising powering said receiving by a signal comprising said received multi-bit location data.
34. A method according to claim 32, further comprising storing said received multi-bit location data.
35. A method according to claim 32, further comprising communicating said received multi-bit identification from said data terminal equipment to a location database.
36. A method according to claim 21, wherein said pre-determined signaling voltage is a classification voltage.
37. A method according to claim 21, wherein said pre-determined signaling voltage is current limited, said current limited voltage signal presenting less power than an amount that damages a data terminal equipment which has not been designed to accept power over communication cabling connected via the communication cabling.
38. A method according to claim 21, wherein said predetermined signaling voltage signal is above 10 volts.
39. A method according to claim 21, wherein said pre-determined signaling voltage is current limited, is above 10 volts, and is time limited such that the average power of said predetermined voltage signal over a predetermined cycle time is less than 150 milliwatts.
40. A method according to claim 21, wherein said multi-bit location data comprises one of a geographic location and a civic location.
41. A system for automatic location identification comprising:
- a current limited voltage source;
- a telecommunications outlet;
- a communication cabling connecting said current limited voltage source to said telecommunications outlet;
- a data terminal equipment connected to said telecommunications outlet; and
- a location identifier associated with said telecommunications outlet, said location identifier being responsive to a pre-determined voltage signal from said current limited voltage source to transmit a multi-bit location data to said data terminal equipment.
42. A system for automatic location identification comprising:
- a current limited voltage source;
- a telecommunications outlet;
- a communication cabling connecting said current limited voltage source to said telecommunications outlet;
- a data terminal equipment connected to said telecommunications outlet; and
- a location identifier associated with said telecommunications outlet, said location identifier being responsive to a pre-determined voltage signal from said current limited voltage source to transmit a multi-bit location data to said data terminal equipment.
43. A system for asset management comprising:
- one of a switch, hub, router and bridge;
- a current limited voltage source associated with said one of a switch, hub and router;
- a location database;
- at least one of a telecommunications outlet, a consolidation point, a user patch panel and an equipment patch panel, each comprising a location identifier; and
- a plurality of communication cabling serially connecting said one of a switch, hub and router to each of said equipment patch panel, user patch panel, consolidation point and telecommunications outlet;
- said current limited voltage source being operative to signal in turn each of said location identifier of said equipment patch panel, user patch panel, consolidation point and telecommunications outlet,
- each of said location identifiers transmitting location information to said current limited voltage source responsive to said signal.
Type: Application
Filed: Feb 19, 2007
Publication Date: Sep 6, 2007
Patent Grant number: 8073110
Applicant: POWERDSINE, LTD. - MICROSEMI CORPORATION (Hod Hasharon)
Inventors: David PINCU (Holon), Roni BLAUT (Netanya), Yair DARSHAN (Petach Tikva)
Application Number: 11/676,314
International Classification: H04M 1/56 (20060101); H04M 15/06 (20060101);
